OpenFlowKit
OpenFlowKit: A flexible free diagramming workspace for technical teams that prefer editable, portable outputs. Ranked #1 of 32 in AI Diagram Generators by our editors (9.4/10); pricing: Free plan; best for teams wanting free, flexible AI diagramming.
At a glance
- Editor score9.4 / 10
- PricingFree plan
- Best forTeams wanting free, flexible AI diagramming
- Free planYes
- Paid fromFree
- Mermaid supportYes
- Facts checked20 Sep 2026
Where it wins
- Generates editable diagrams from prompts, code, SQL, and infrastructure sources
- Supports Mermaid and OpenFlow DSL editing with canvas synchronization
- Exports to PNG, SVG, JSON, Mermaid, PlantUML, Figma, and video
Where it doesn't
- AI generation requires users to provide their own provider key
- WebRTC collaboration is opt-in beta and off by default
- Self-hosting requires users to deploy the static application themselves
Our verdict on OpenFlowKit
OpenFlowKit is a local-first diagramming workspace for developers and technical teams. It turns prompts, source code, Mermaid, SQL, OpenAPI, Terraform, Kubernetes, and other structured inputs into editable diagrams. The browser-based editor combines visual editing with diagram-as-code workflows, automatic graph layout, collaboration rooms, and exports across image, vector, text, design, and video formats. It is open-source, MIT-licensed, requires no account, and can be self-hosted.
Pricing is straightforward: the published Free Forever plan costs $0 USD and includes unlimited diagrams and projects, local saving, one-click auto-layout, Mermaid.js support, and AI diagram generation with your own key. That makes OpenFlowKit a strong fit for teams that want to avoid a paid diagramming subscription while retaining control over storage and AI provider access. The bring-your-own-key model also connects with OpenAI, Anthropic Claude, Google Gemini, Groq, Mistral, NVIDIA NIM, Cerebras, OpenRouter, and Ollama. Users who want to connect technical workflows can use MCP server support with Claude Desktop, Cursor, and Windsurf.
Its standout capability is the combination of structured imports, editable DSLs, and bidirectional canvas synchronization. A diagram can remain connected to Mermaid or OpenFlow representations rather than becoming a static visual, while ELK.js provides automatic graph layout. Exports include PNG, JPG, SVG, JSON, Mermaid, PlantUML, Figma editable export, WebM, and MP4. Real-time collaboration rooms add presence and connection status, although WebRTC collaboration is opt-in beta and off by default. OpenFlowKit suits developers and technical teams prioritizing flexibility, local-first storage, and broad interoperability; teams wanting a fully managed collaboration service or built-in AI access without managing provider keys should choose another option.
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OpenFlowKit pricing
All 1 OpenFlowKit plans and prices →
OpenFlowKit fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| AI diagram limit | Not verified |
| Mermaid support | Yes |
| Real-time collaboration | Yes |
| Diagram import | Yes |
| Platform | Web+desktop |
| Export formats | PNG, JPG, SVG, JSON, Mermaid, PlantUML, Figma editable export, WebM, MP4 |
| Deployment | Cloud, Self-hosted |
| Platforms | Web |
| Support | Docs |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Integrations | 13 integrations: OpenAI, Anthropic Claude, Google Gemini, Groq, Mistral, NVIDIA NIM … |
| Pricing | Free plan (source) |
| Website | openflowkit.com |
| Facts checked | 20 Sep 2026 |
OpenFlowKit integrations
OpenFlowKit lists 13 integrations on its own site.
- OpenAI
- Anthropic Claude
- Google Gemini
- Groq
- Mistral
- NVIDIA NIM
- Cerebras
- OpenRouter
- Ollama
- Figma
- Claude Desktop
- Cursor
- Windsurf
Alternatives to OpenFlowKit
- EraserA broad diagram workspace combining AI, diagram-as-code, collaboration, and integrations.9.3
- ArchwayA broad architecture diagram generator with AI input, collaboration, APIs, and self-hosting.9.2
- LetDrawA low-cost technical diagramming workspace with AI, collaboration, and developer-friendly imports.9.1
See all OpenFlowKit alternatives →
OpenFlowKit vs the competition
- OpenFlowKit vs Eraser
- OpenFlowKit vs Archway
- OpenFlowKit vs LetDraw
- OpenFlowKit vs sysdraw
- OpenFlowKit vs Lucid Train
- OpenFlowKit vs Mermaid Chart
Compare OpenFlowKit with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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